Siemens SIMOVERT MASTERDRIVES Manual page 181

05.2006
Application
DANGER
NOTE
Siemens AG 6SE7087-6QX70 (Version AG)
SIMOVERT MASTERDRIVES
The basic positioner consists of the three free blocks and is available at
no extra cost with the same functionality as the basic unit to provide a
solution for "basic" positioning applications.
(In the factory setting, the three free blocks are completely pre-wired
for the "basic positioner with motor encoder" application.)
The positioner leaves all options open to the user when designing a
solution for a positioning task. Thus, the positioner can be expanded or
modified by its own BICO interconnections from the blocks available in
the unit.
The user is responsible for taking account of and providing
interlocks for the relevant safety requirements when implementing
a positioning task using the basic positioner.
The positioner only operates as a pure position controller. The
positioner is enabled using B0220 on U866.1 ENABLE_POS_REF
(enable basic positioner).
It is expected that parameter assignment of the basic unit has already
taken place before the commissioning of the positioner.
Process data traffic is not linked to predefined jobs (e.g. from an S7),
but can be implemented using the PKW/PZD basic unit functions (see
project examples).
Using the communication options of the basic unit (SIMOLINK, USS-
BUS, PROFIBUS-DP, etc.), the position setpoint, maximum speed,
acceleration and deceleration and the control word can be processed
directly as setpoints and the actual values and statuses can be read
back.
The setup/positioning block is a setpoint generator. The position and
speed setpoints required for a positioning process are formed from the
target position, the maximum speed and the maximum acceleration or
deceleration.
These parameters are used to calculate the speed and position
setpoints such that the target position is reached without violating the
specified limits.
The setpoint generator can also be used as a pure ramp function
generator and setpoint generator for a control process (setup) or as
lead value source for synchronous tasks.
The setpoint transfer block carries out the setpoint transfer and
interlocks the possible modes of homing, positioning and setup.
This also generates a homing movement that processes the core block
as a ramp generator (SETUP) using reversing cams.
The correction block/homing command provides the setpoints with
speed precontrol, the position correction signals and handles the
measured value memory.
Compendium Motion Control
Functions
7-15